Revolving hopper mouth



Aug. 22, 1961 R. DORVILLE REvoLvING HOPPER MOUTH 2 Sheets-Sheet 1 Filed Oct. 24, 1958 INVENTOR ROBERT DORVILLE FIG.

ATTORNEY Aug. 22, 1961 Filed OGL. 24, 1958 R. DORVILLE REVOLVING HOPPER MOUTH 2 Sheets-Sheet 2 NVENTOR Fl G 2 ROBERT DORVILLE ATTORNEY United States Patent 2,997,189 REVOLVING HOPPER MOUTH Robert Dorville, Montigny les Metz, France, assignor to Compagnie dEtudes Techniques et Installations Generales, Metz (Moselle), France Filed Oct. 24, 1958, Ser. No. 769,353 Claims priority, application France Oct. 26, 1957 1 Claim. (Cl. 214-36) In the revolving hopper mouths produced up till now, there is a large diameter joint between the revolving hopper and the fixed bunker of the mouth. This joint has always been a weak point, whose proper working often proves to be unsatisfactory, and, in modern mouths, while they have been considerably improved and enable a tight lit to be obtained, even at very high pressures, it nevertheless remains lthat this entails very delicate and scrupulously careful construction and must be thoroughly well maintained if its tight t is to remain efficient.

One of the objects of the invention is to do away with any joint between the revolving hopper and the iixed bunker of the mouth.

Another purpose of the invention is to produce a mouth having the same charging features as the conventional revolving mouth.

A device according to the invention is shown by way of non-restrictive example in the attached drawings, in which:

FIGURE 1 is a diagrammatical elevation and crosssectional View of a mouth according to the invention.

FIGURE 2 is a diagrammatical side and cross-sectional View of the mouth of FIGURE 1.

The mouth shown in the attached gures comprises a riddle in two truncated parts 11 and 12, fixed on the iron- Work 2. of the mouth and closed at its lower part by the large bell 3. At its upper part, it comprises a cast steel ring 4 forming the seating of the small bell 5. The operating rod 6 of the large bell 3 passes inside the tubular rod 7 of the small bell 5. The revolving hopper is independent of the double-bell mouth. It comprises:

The body of the revolving hopper 81,

The closing cone 82,

A tubular suspension rod 83 outside of the rod 7 of the small bell and suspended on this rod by means of an abutment 84,

The body of the revolving hopper carries a crown 85 on which the centering rollers 86 bear which maintain the assembly in a vertical position.

The revolving hopper is rotatively driven by a reducinggear driving unit 9 fitted on the mouth, through a tootL ed crown Wheel 10 fixed on the crown 85.

The automation of the movements: opening and closing of the bells, rotation of the hopper according to a predetermined program, is ensured as with conventional mouths by program switches.

The mouth operates in the following manner:

In the position shown in the iigures, the revolving hopper is in course of charging or rotating. The small bell 5 being closed, the body 31 of the hopper has been raised by its closing cone 82, which is itself driven by its rod 83 and the abutment 84, and no longer rests on the iixed part of the mouth.

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The revolving unit 82, 83 and 81 is thus entirely suspended from the abutment 84 at the top part, and guided at the bottom part by the rollers 86 ensuring the centering of the revolving hopper during its rotation.

When the riddle is being filled, the rods 83 and 7 simultaneously descend, the body 8 of the hopper rests on the bearing crown 85 provided on the element 4 and the movement continuing, the revolving hopper opens and empties then into the riddle.

During the rise of the small bell 5, the closing'cone 82 of the revolving hopper first of all presses on its seating, raises the body 81 of the hopper by liberating the bunker of the mouth, then the small bell 5 presses on its seating, ensuring the closing of the riddle.

A device of this kind has the advantage of completely doing away with slippery joints, with the exception of the stuiiing-box between the rods of the large and small bells, which is of small size and easy to make.

Moreover, this mouth possesses all the charging features of the conventional revolving mouth. It operates with the same automatic periodical rotation device of the hopper. The dropping height of the materials remains practically the same and this mouth can be adapted with any kind of working-pressure at the blast furnace mouth, without being in bondage to the behaviour of the revolving joint, which has been eliminated.

It is clearly understood that the invention is not restricted to the examples of embodiment precisely described and shown, and from which other alternatives can be obtained without going outside of the scope of the invention for this purpose.

What I claim is:

In a revolving hopper mouth, in combination, a xed body, a riddle, a rst bell, a second bell, said first bell being disposed to close the upper part of said riddle and the second bell being disposed to close the lower part of said riddle, a revolving hopper, a cast steel ring secured to the upper portion of the riddle, centering rollers for the hopper mounted on said ring, a closing cone positioned to close the revolving hopper mouth, a tubular suspension shaft, a rst actuating shaft connected to said tirst bell, a second actuating shaft connected to said second bell, said tubular suspension shaft and said rst shaft and said second shaft being concentrically disposed and the closing cone being connected to the suspension shaft, said revolving hopper being guided laterally by the centering rollers but having limited playin the vertical direction whereby the closing cone is adapted to be closely applied to the mouth of said revolving hopper to close the same, the entire assembly dened by the closing cone and the revolving hopper being liitable by the traction exerted by the suspension shaft in order to ensure eiiective fluid-tightness at the mouth of the revolving hopper at the time of the closing of said hopper.

References Cited in the le of this patent UNITED STATES PATENTS 864,053 Witherbee Aug. 20, 1907 1,891,821 Iuengling Dec. 20, 1932 2,606,672 Avery Aug. 12, 1952 

